// This file is part of the FidelityFX Super Resolution 3.1 Unreal Engine Plugin.
//
// Copyright (c) 2023-2025 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// THE SOFTWARE.

#include "FFXFrameInterpolationViewExtension.h"
#include "FFXFrameInterpolation.h"
#include "PostProcess/PostProcessing.h"
#include "ScenePrivate.h"
#include "../../FFXFSR3TemporalUpscaling/Public/FFXFSR3History.h"

namespace FFXFIStrings
{
	static constexpr auto D3D12 = TEXT("D3D12");
}

FFXFrameInterpolationViewExtension::FFXFrameInterpolationViewExtension(const FAutoRegister& AutoRegister, FFXFrameInterpolation* InFrameInterpolation) 
: FSceneViewExtensionBase(AutoRegister)
, FrameInterpolation(InFrameInterpolation)
, bFrameInterpolationSupported(false)
{
	FString RHIName = GDynamicRHI->GetName();
	if (RHIName == FFXFIStrings::D3D12)
	{
		bFrameInterpolationSupported = true;
	}
}

void FFXFrameInterpolationViewExtension::PrePostProcessPass_RenderThread(FRDGBuilder& GraphBuilder, const FSceneView& View, const FPostProcessingInputs& Inputs)
{
	if (View.GetFeatureLevel() > ERHIFeatureLevel::SM5 || (bFrameInterpolationSupported && View.GetFeatureLevel() == ERHIFeatureLevel::SM5))
	{
		FrameInterpolation->SetupView(View, Inputs);
	}
}